Machine for pulling fastenings



y 1929- F. L. MACKENZIE MACHINE FOR PULLING FASTENINGS Filed Nov'. 12,

1921 2 Sheets-Sheet 1 y 1.929. F. L. MACKENZIE MACHINE FOR PULLING FASTENINGS Filed Nov. 12, 1921 2 Sheets-Sheet 2 Patented May 7, 1929.

. UNITED "STATES I lflllfitS' PATENT orricis.

RRRD L. nacxnnzrn, 0R BEVERLY; mnssacnusnrrs, AssIenoR T0 UNITED SHOE MACHINERY coRPoRArIon, OF"PATERSON, new JnRsnY, A CQEPORAT-ION on NEW JERSEY.

MACHINE roR PULLING 'rasrnn nes.

This invention relates'to the manufacture of shoes and is illustrated as embod1ed in a 'machine for'pulhng fastenmgs such as tacks which have been utilized as temporary means for securing together shoe parts duringthe manufacture of shoes.

Inmanufaoturing certain types of shoes, for example Goodyear welts, it-is usual to secure each lasted upperto its insole and last by means of tacks which form no permanent'part of the completed shoe. and which later, usually after the permanent fastening means have been inserted, must be removed. To facilitate the pulling of these lasting tacks it is usual to drivethem only part way so that their heads may be easilyengaged by a tack pullmg tool or machine. There are a number of different tack pulling machines in use at .the present timewlnch operate 1n an efficient manner. Most of these machines, however, have a tendency. to scatterthe pulled'tacks instead of deliveringthemto a receptacle such as is generally provided for that purpose. It is,

accordingly, an object of the present invention to provide a machine which, while no less effective in the tack pulling operation than the best-of existing machines,- .will practically eliminate the scattering of pulledtacks.

Vith thisobject in :view a feature of'the invention comprises the combination with tack pulling means of novel means, illustrated as a suction conduit or pneumatic conveyor, for carrying off the. tacks as :they are pulled. Preferably the intake of this conveyor or conduitis-located adj acent to the point at which the tacks are released bythe pulling means.

. Itoccasioually happens that the head of a lasting tack is pulled off without the removal of the shank of the tack from the lasted shoe. Moreover there are some operations in the manufacture of shoes, such as the tackingofashank piece to a last upon which a turn shoeis to be relasted, in which headless fastenings are used which must later be extractcd. lflVith these circumstances inview it is an object of the present invention to provide a machine whichwill be effective to pull headless fastenings; In the illustrative machine this is accomplished by causing the tack l/Vith the above andother objects and features in'view the invention will now-be described in connection with the illustrative machine of the accompanying drawings and pointed out in the claims. i

In the drawings,

Fig. l is a side elevation of a tackspulling v 7 machine embodying the present invention;

Fig. 2 is aside elevation on a larger scale of the head of the machine Figs. 3, 4t and 5 are detail views of the tack pulling jaws and associated parts showing them in different positions which they suc cessively assume during the pulling of head ed fa-stenings; Fig. 6 illustrates the use of the tackpulling jaws to extract a headless fastening; and Figs. 7 and 8 illustrate diagrammatically the paths of movement of the pulling a-ws when adj ust-ed to extract headed and headless, fastenings respectively.

The illustratedmachine is provided with a column 8 carrying a head 10 upon which are havinga'dj acentthereto the intake opening 14 of I a pneumatic conveyorcomprising a 0011- du1t'16 provided with a power operated pump or. fan 18 arranged to cause suction through theconduit. Mounted in the head of the machine 1s a shaft 20 driven fromanysource of power and prov1ded with anieccentric 22and vmounted tack pulling instrumentalities 12- a cam member or members having cam tracks of tack pullingfjaws 38 and 40. The formation of cam tracks 2a and 26 and .their 'relation'to eccentric 22 is such that jaws 38 and 40 are moved towards one another when at-the lower extremities of their paths of movement, as diagrammatically illustrated in )Fig. 7, and arethus caused togripthe tacks beneath their heads and to maintain this grip asthey move upwardly to extract the tacks. WVhen the tacks are opposite the intake opening 14 the jaws38, 40 move apart and release the-tacks which are then sucked through the opening i the cam rolls levers Stand 36 support a pair 14; into the conduit and carried off to a suit able receptacle which may be. providedfor will thus be apparent that by raising jaw it) with respect to thej aw 38 and by adjusting it so that its path of movement towards the tack will overlap'that of jaw 38, as indicated in l i g. 8, the two aws may be. caused to engage headless fastenings upon opposite sides at different points along. their lengths so that the fastenings will be bent as indicated in Fi 6 in a manner which will overcome the tendency of the'jaws to slide off the ends of the fastenings and will in effect result in the formation by the machine of heads upon these headless fastenings prior to the pulling thereofJ As illustratec the tackpulling jaws are provided with a pair of guards 50, 52 arranged to prevent the work from being moved into such position as to be pinched between the jaws or in any way damaged thereby.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine of the-class described having,

in combination, movable fastening pulling means, and independent means acting upon the fastenings at the point at which they'are pulled for carrying off said fastenlngs from the pulling means.

2. A machine of the class described having,

in combination, fastening pulling means, and

means arranged independently of the fastening pulling means to carry off fastenings froi the point at which theyare pulled.

3. A machine of the class described having, in combination, fastening'pulling means, and a pneumatic conveyor arranged to carry off pulley fastenings.

4. A machine of the class described having, in combination, fastening pulling means, a part adjacent to the point at which said fas tenings are pulled, said part having an opening therein, and a power-operated conveyor arranged to carry off pulled fastenings which have been received by said opening.

5. A machine of the class described having in combination, fastening pulling means, a part adjacent to saidmeans having an opening therein, and a suction device for causing pulled fastenings to be carried oflthrough said opening.

6. A machine of the class described having, in combination, fastening pulling means, a part adjacent to said means having an opening therein, and a pneumatic conveyor arranged to carry off pulled fastenings through said opening.

7. A fastening pulling machine having, in combination, 7 a conduit having. an intake opening, fastening pulling ineansarranged to release pulled fastenings adjacent to said opening, and means for carrying the released fastenings through the opening. I

8. A machine of the class'descrilied haviu g, in combination, fastening pulling means, a conduit having an opening adjacent to said means, and means for producing an air current in said conduit to carry off pulled fastenings.

9. A machine of the class described having, in combination, fastening pulling means, a conduit having an opening adjacent to said means, and a pump arranged to produce an air current through said conduit to carry off pulled fastenings 10. A machine of the class described having, in combination, fastening pulling means, a. conduit having an opening adjacent to said means, and a fan arranged to cause anair current in said conduit to carry pulled fastenings through the openingand into and tln-ough the conduit.

11. A tack pulling machine having, in combination, a pair of tack pulling jaws, a conduit, and means for causing suction in the.

conduit, the conduit having an intake opening adjacent to the jaws arranged to receive the tacks from the jaws.

12. A fastening pulling machine having, in combination, fastening pulling means, a part having an opening adjacent to said means, a deflectoradjacentto the opening to prevent the passage of pulled fastenings therepast, and power-operated means for carrying off the pulled fastenings.

Y 13. A fastening pulling machi .9; having, in combination, fastening pulling means, a conduit having an opening adjacent to said mean s, a suction device for causing an air current in the conduit to suck pulled fastenings therethrough, anda deflector adjacent to the opening to prevent the passage-of the pulled fastenings therepast.

14:- A machine of the class described having, in combination, fastening pulling means,

a conduit having an opening adjacent to said means, a deflector arranged to prevent the passage of fastenings past said opening, and

conveyor for carrying off pulled fastenings 7 through said opening.

16. A fastening pulling machine having, in combination, a pair of fastening pulling jaws, a part having an openingadjacent to said jaws, and a suction device for carrying off pulled fastenings' through said opening.

17. A fastening pulling machine having, in combination, a conduit having an intake opening, a pair of fastening pulling jaws arranged to release the pulled fastenings adj acent to said opening, and means for carrying the released fastenings through the opening.

18. A fastening pulling machine having in combination, a pair of fastening pulling jaws, a conduit having an intake opening adjacent thereto, and a fan arranged to suck pulled fastenings through the opening.

19. A fastening pulling machine having,

in combination, a pair of fastening engaging and pulling aws, and means for operating said jaws to causethem to grip and pull fastenings, one of the jaws being adjustably mounted so that the aws may be arranged to grip thefastening either with the jaws in alinement or with the jaws relatively displaced so that they engage the fastening upon opposite sides at different points along its length. i

22. A fastening'pulling machine having, in combination, a pair of fastening pulling jaws, and means for actuating said jaws to cause them to approach and grip afastening aws to bend the fastenings upon pneumatic conveyor.

with the fastening engaging portion of the e two jaws out of alinement in the direction of the length 0f the fastening so as to bend the fastening as the jaws engage therewith.

23. fastening pulling machine having,

in combination, a pair of fastening engaging and pulling jaws, and means for actuating said jaws to cause them to grip and pull fastenings, the jaws being adjustably mounted so that they may be arranged to grip the fastenings either with the jaws in alinement or with the jaws relatively displaced so that they engage the fastenings upon opposite sides at different points along their length.

24%. A fastening pulling machine having, incombination, a pair of fastening pulling aws arranged to form a head upon a headless fastening and thereafter to pullthe fastening. A fastening pulling machine having,

in combination, fastening pulling members, l

and means for operating said members to cause them to form a head upon a headless i fastening and to pull the fastening.

A fastening pulling machine having, in combination, fastening pulling instrumentalities constructed and arranged to form a head upon a headless fastening and to extract the fasteningby a pull exerted upon the head thus formed. 27. A fastening pulling machine having, 111 combinatiom'a pneumatic conveyor, and

fastcmingpulling meanslocated adjacent to the conveyor and arranged to reciprocate be tween two extreme positions 1n one of which positions the fastening 1s pulledand 1n the other of which positions the fastening is discharged from the pulling means into the In testimony whereof I have signed my name to this specification.

FRED L. MACKENZIE. 

